The BD1222J50200AHF from TTM Technologies is a Balun with Frequency 1.2 to 2.2 GHz, Amplitude Balance ±0.4 to 0.9 dB, Phase Balance 2 to 6 Degree, Insertion Loss 0.4 to 0.6 dB, Power 2 W. Tags: Surface Mount, Balanced to Unbalanced. More details for BD1222J50200AHF can be seen below.